Anomalies in the heat-capacity signatures of submonolayer adsorbates with attractive lateral interactions

The analytic closed form of the heat-capacity signatures previously derived for the McQuistan–Hock (MQH) model of a lattice gas is applied to various adsorbed systems for which the lateral interaction varies from a few meV to about 300 meV. It is shown that whenever the adsorption system can be desc...

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Published in:The Journal of chemical physics 1988-06, Vol.88 (11), p.7066-7070
Main Authors: KIM, Y. S, BATTAGLIA, F, GEORGE, T. F
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
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description The analytic closed form of the heat-capacity signatures previously derived for the McQuistan–Hock (MQH) model of a lattice gas is applied to various adsorbed systems for which the lateral interaction varies from a few meV to about 300 meV. It is shown that whenever the adsorption system can be described by a two-dimensional gas on which the substrate effects are less important than the adatom–adatom interactions, the computed temperatures at which the heat-capacity signatures display their maximum are in excellent agreement with the experimental measurements.
doi_str_mv 10.1063/1.454356
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subjects Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
title Anomalies in the heat-capacity signatures of submonolayer adsorbates with attractive lateral interactions
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